12th cbse physics most expected mcq's for2025
Here are some of the most expected MCQs for 12th CBSE Physics 2025:
Electrostatics
- _What is the SI unit of electric flux?_
- A point charge is placed at the centre of a cube. The flux through one face is:
Current Electricity
- _The drift velocity of electrons increases if:_
- _Derive the formula for the equivalent resistance for resistors in parallel._
Magnetism
- _What is the unit of magnetic permeability in free space?_
Optics
- _What happens to the resolving power of a microscope when wavelength decreases?_
- _Define wavefront. State Huygens' principle._
Wave Optics
- _What are coherent sources? Why are they essential for interference?_
- _State and derive Ohm’s law in terms of drift velocity._
Semiconductors
- _Explain the concept of rectification. Draw the circuit for a full-wave rectifier._
Dual Nature of Matter
- _What is the photoelectric effect? Write Einstein’s equation._
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